These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / fs / binfmt_elf.c

diff --git a/kernel/fs/binfmt_elf.c b/kernel/fs/binfmt_elf.c
index cd46e41..3a93755 100644 (file)
--- a/kernel/fs/binfmt_elf.c
+++ b/kernel/fs/binfmt_elf.c
@@ -35,6 +35,7 @@
 #include <linux/utsname.h>
 #include <linux/coredump.h>
 #include <linux/sched.h>
+#include <linux/dax.h>
 #include <asm/uaccess.h>
 #include <asm/param.h>
 #include <asm/page.h>
@@ -487,7 +488,7 @@ static inline int arch_elf_pt_proc(struct elfhdr *ehdr,
 }
 
 /**
- * arch_check_elf() - check a PT_LOPROC..PT_HIPROC ELF program header
+ * arch_check_elf() - check an ELF executable
  * @ehdr:      The main ELF header
  * @has_interp:        True if the ELF has an interpreter, else false.
  * @state:     Architecture-specific state preserved throughout the process
@@ -759,16 +760,16 @@ static int load_elf_binary(struct linux_binprm *bprm)
                         */
                        would_dump(bprm, interpreter);
 
-                       retval = kernel_read(interpreter, 0, bprm->buf,
-                                            BINPRM_BUF_SIZE);
-                       if (retval != BINPRM_BUF_SIZE) {
+                       /* Get the exec headers */
+                       retval = kernel_read(interpreter, 0,
+                                            (void *)&loc->interp_elf_ex,
+                                            sizeof(loc->interp_elf_ex));
+                       if (retval != sizeof(loc->interp_elf_ex)) {
                                if (retval >= 0)
                                        retval = -EIO;
                                goto out_free_dentry;
                        }
 
-                       /* Get the exec headers */
-                       loc->interp_elf_ex = *((struct elfhdr *)bprm->buf);
                        break;
                }
                elf_ppnt++;
@@ -1236,6 +1237,15 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma,
        if (vma->vm_flags & VM_DONTDUMP)
                return 0;
 
+       /* support for DAX */
+       if (vma_is_dax(vma)) {
+               if ((vma->vm_flags & VM_SHARED) && FILTER(DAX_SHARED))
+                       goto whole;
+               if (!(vma->vm_flags & VM_SHARED) && FILTER(DAX_PRIVATE))
+                       goto whole;
+               return 0;
+       }
+
        /* Hugetlb memory check */
        if (vma->vm_flags & VM_HUGETLB) {
                if ((vma->vm_flags & VM_SHARED) && FILTER(HUGETLB_SHARED))
@@ -1530,7 +1540,7 @@ static int fill_files_note(struct memelfnote *note)
                file = vma->vm_file;
                if (!file)
                        continue;
-               filename = d_path(&file->f_path, name_curpos, remaining);
+               filename = file_path(file, name_curpos, remaining);
                if (IS_ERR(filename)) {
                        if (PTR_ERR(filename) == -ENAMETOOLONG) {
                                vfree(data);
@@ -1540,7 +1550,7 @@ static int fill_files_note(struct memelfnote *note)
                        continue;
                }
 
-               /* d_path() fills at the end, move name down */
+               /* file_path() fills at the end, move name down */
                /* n = strlen(filename) + 1: */
                n = (name_curpos + remaining) - filename;
                remaining = filename - name_curpos;